/*
	Copyright 2010 Cliqset Inc.
	
	Licensed under the Apache License, Version 2.0 (the "License"); 
	you may not use this file except in compliance with the License. 
	You may obtain a copy of the License at 
	
		http://www.apache.org/licenses/LICENSE-2.0 
	
	Unless required by applicable law or agreed to in writing, software 
	distributed under the License is distributed on an "AS IS" BASIS, 
	WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
	See the License for the specific language governing permissions and 
	limitations under the License.
*/
package com.cliqset.magicsig;

import java.util.Map;

import com.cliqset.magicsig.guice.DefaultMagicEnvelopeSerializationModule;
import com.google.inject.Guice;
import com.google.inject.Inject;
import com.google.inject.Injector;

public class MagicEnvelopeSerializationProvider {

	private Map<String, MagicEnvelopeDeserializer> deserializers;
	private Map<String, MagicEnvelopeSerializer> serializers;
	
	@Inject
	private MagicEnvelopeSerializationProvider (
			Map<String, MagicEnvelopeSerializer> serializers, 
			Map<String, MagicEnvelopeDeserializer> deserializers) {
		
		this.serializers = serializers;
		this.deserializers = deserializers;
	}
	
	public MagicEnvelopeDeserializer getDeserializer(String mediaType) throws MagicSigException {
		if (null == mediaType) { throw new IllegalArgumentException("Cannot retrieve MagicEnvelopeDeserializer with a null media-type"); }
		
		MagicEnvelopeDeserializer d = this.deserializers.get(mediaType);
		if (null == d) {
			throw new MagicSigException("No known deserializer for media-type " + mediaType);
		}
		return d;
	}
	
	public MagicEnvelopeSerializer getSerializer(String mediaType) throws MagicSigException {
		if (null == mediaType) { throw new IllegalArgumentException("Cannot retrieve MagicEnvelopeSerializer with a null media-type"); }
		
		MagicEnvelopeSerializer s = this.serializers.get(mediaType);
		if (null == s) {
			throw new MagicSigException("No known serializer for media-type " + mediaType);
		}
		return s;
	}
	
	public static MagicEnvelopeSerializationProvider getDefault() {
		Injector i = Guice.createInjector(new DefaultMagicEnvelopeSerializationModule());
		return i.getInstance(MagicEnvelopeSerializationProvider.class);
	}
}
